Electric regulator for incubators.



G. CARTER, BLBGTRlG REGULATOR FOP 'INCUBATORS.

' .APPLIGTION Mum mxo. 1o, um.

Patented NGV. 18, 193.

C. C. CARTER. ELBOTRG REGULATOR FOR INCUBATOBS.

APPLICATION FILED DEC.10, 1912.

Patented Nov. 18, 1913,

3 SHEETS-SHEET 2 ATTORNEYS "0.momma-R.4 ELECTRIC REGULATOR FOR INGUBA'IORS.l

APPLICATION TILBD 13110.10, 1912.

Patented Nov. 18, 1913.

3 SHEETS-SHEET 3.

WITNESS S Mw ATTORNEYS citizen of the CURTIS C. CARTER, OF CHAPIN, ILLINOIS.

ELECTRIC REGULATOR FOR ICUBATORS.

Leraars.

Specification of Letters Patent.

Patented Nov. 18, 1913.

Application led December 10, 1912. Serial No. 735,920.

To all 107mm it 'may concern:

Be it known that I, CURTIS C. CARTER, a UnitedStates, and a resident oit' Chapin, in the county of Morgan and State of Illinois, have invented a new and Improved Electric Regulator' for incubators, ot' which the following is a full, clear,V and' exact description.

The objectI of the a new and improved electric regulator for incnbators, arranged to maintain a uniform temperature within the incubator when supplied with a heating medium of an approximately uniform temperature and irrespecltive ot' the temperature of the surroundin air.

or the purpose mentioned, use is made of means for controlling the circulation of outside air to t-he incubator, the means being controlled by the temperature within the incubator .independent of the temperatiire of the heating medium.

A practical embodiment of the invention is represented in the accompanying drawings forming a part of this specication, in which similar characters of reference indicate corresponding part-s in all the views.

Figure 1 is a plan view oit an incubator provided'vvith the electric regulator and alarm; Fig. 2 is a sectional side elevation of the same on the line 2-2 of Fig. i; Fig. 3 is a cross section of the over-balancing dcvice on the top door and the switch, the door being shown in closed position; Fig. 4 is a similan view ofthe same with the top door in open position; F ig. 5 is a cross section of the incubator and the electric regulator, the section being on the line 5-5 of Fig. 9,; and Fiets. 6 and 7 are diagrammatic views of the electr'ic regulator showing the battery and electrical connections.

The casing A ofthe incubator is provided in its. lower portion with heating means B connected with a source of heat of an approximately uniform temperature, the heating means B as shown being 1n the 'form of a tube through which passes hot Water from a boiler or other device. Above the heating means B are arz nged traysl C containing the eggs to be hatched and which trays can be removed from the casing through a suitable door D, preferably at the front thereof (see Fig. 5). The top Aband bottom A2 of the casing A are provided 'with doors A3 and A4, of which the top door A3 is mounted to swing at its middle invention is to provide J. The rods on trunnions Il and El, of which the trun- Y mon .ttl 1s attached to the top A1 oi the casing and engages a bearing FF on the door AJ. The trunnion E is in the form of a shaft attached to the door A3 at E and journaled in a bearing E* secured to the top A1 ot' the casing A. rlhe door A is conn'ccted with the door A* by alink A5 (see Fig. 5), and the bottom door A is connected at its' middle by pivots Ils with the bottom A2, so that the doors A3, A" swing simultaneously into open or closed position, as hercinafter more fully explained. On the outer end of the trunnion l] is secured an arm F extending in opposite directions from the trunnion E, having its ends connected by links F1, F2 with the movable cores G2 and G3 of solenoids G and G', supported at one end ot' the easing A., as plainly indicated in Fig. 2. The solcnoids G are electrically connected with a battery I-I or other source oit electrical energy, and the said sclenoids are also electrically connected with contact rods I and I1 arranged within the casing A, and between the inner ends of the said contact rods .I and I extends the rcc end oit a thermostat J, preferably formed ot' two metal bars ot ditl'ercnt materials (copper and iron) and length, so as to be influenced by the heat within the casing` to make contact `with either ot thc contact rods I and Il. Thus when the temperature within the casing A increases beyond a normal degree then the thermostat J makes contact with the rod I, and when the temperature within the casing falls below a normal desired temperature then the thermostat. J makes contactwith the rod I. The inner ends I2 and I3 ot the contact rods I and Il are thrladcd and screw in nuts K and KL held insulated on a bracket In attached to a bracket K3 snpported on one side of` the casing A, the bracket V2 Lilso supportingl the thermostat I and Il extend through the sides of the easing to thc outside thereof so as to permit adjustment of the rods I and Il relative to the thermostat J, by turning the rods with a view to screw the same iniward oroutward until the inner ends of the rods are in the desired position relative to the thermostat J. The nuts K and K1 are connected by wires G, G5 with the solenoids G, G1, and asv the contact rods I and I1 Screw in the said nuts an electrical connee tion is had between the solenoids and the said contact rods I and I1.

'inected by Wires N2 verse to the axis of the trunnionsE, El

' arni F onently sii-'ing the doorslag?, lli-finto a partly i shown) 1s sounded.

` linder .Q1 passes l can now remedy the detect byincreasing the The top door A5 is'provided adjacent the trnnnion E with an insulated armla, the :tree

end et which is adapted to engage segmental' contact plates N and N1l spaced apar-t and mounted on a plate U of insulating material, the plate being attached to a bracket 01 secured to the top A1 of the casing. rl`he contact plates N and N1' are electrically conand N3 with the battery ll, and the arm L is electrically connected by a Wire 'L1 with the thermostat Ll, as plainly indicated in. Figs. 6 and 7.

@n the plate U is secured a spring tongue Nt overlying the contact plate N and terminating adjacent the contact plate N1, the tre/e end ot the tongue .tact With the insulating plate 0.

' 0n the top door A3 is secured an overbalancing device Q orf moving the doors A, A* beyond the range of the solenoids G, Gl into tully open orv fully:closedv position, as @hereinafter more fully explained. :=.The overbalancing device Q is preferably construct'edv as follows: A cylinder Q1 is attached at one end'byl brackets Q2 tothe upper surface of the door A3 so as to hold the cylinder @l in uanincl-inedposition and' transas plainly indicated in Figs. 1 and 2. lnv the cylinder Q1 is mounted to travel a Weight, pret'crably'in the` form of annetal 4ball Q3 soth'at WhenA the doors A3 and A4 are partly open@ and the 'cylinder (d1-passes a horizontall 'plane' then the balli);3 runs from theinner end of the cylinder Q1 toward the outer end thereof, thus overbalancing the doors A3, A4 with a View to swing the same into full open position. ln alike manner when the door A? moves intoa closedposition and the cylinder Q1 passes a horizontal plane then.4

the ball Q3 runs from the outer end of vthe cylinder Q1 to the inner end thereot, thus overbalancing the doors A3, A* ina reverse direction, whereby thedoors are moved completely shut. y

The operation lis as follows: ll/'hen the several parts are in the position shown in lr 1,'2, 3 and 5 then thedoors hr3, if are closed and the thermostat J vis in dormant position relative to the contact rods l and l1, that is, is intermediate the inner ends of the said rods. The. hatching temperatureWithin the casing -is supposed to be normally 1030. Now presuming that the temperature within the casing A increases owing to the tact that the heating medium of the heating means' B- is say at a uniform tenrperaturey of 140o then the thermostat J makes contact with the contact rod l see Fig. .6) Vto ener; je' thesolenoid Gr whereby Athe core G2 thereof. exerts a Apull on the linlr F1 and to turn thetrunnion open position. 1iil'hcn tn iey K .the horizontal plane during the opening Ni being normally in conlinal closing; position uniform temperature.

the l ture, then and conse- 1 with the contact rod rlhe operator 1n charge i moyement oit the doors da, tl

Q3 travels the inner end ai. Q1 to the outer end doors A3, A@ into comp etely @een posi When this taires place the oat-ei' "e pass into the casing A through open door A?, and the over-heated air within. the casing can pass out through the open dear: il@ Now' the iificoming air o f ql r v lower temperature than m39 temperature Within the casing not-iced that when the doors il.` from closed into. open posities travels along the contact plate' the solenoid G energized, and when e l, finally leaves the plate N at the time i; ball Q3 starts to roll outward in the cylind r Q1 then the circuit is broken and the sole noidG is denergiaed, 'the armi-lli new, nioring out from under the tonie N1 and in contact with the contact plate temperature Within the casing has been decreased by the incoming air to` influence the thermostat J suiiiciently to move it out of contact with I A* remain open until the temperature iyithin the casing has fallen below normal tern-l perature so that the thermostat/ d is inducnced to make contact with'the rodllh-asy shown inl `ig- 7. When/this takes place the solenoid G1 is energized and exerts a pull on the arm F to turn the trunnionlE in aI re# 'verse directie vith a View er' air can t. `When the the rod l, then the doors A3,-

p to partly close the doors A?, Alinal closing'ot the door` being accomplished at the time the cylinder4 Q1 pass s a horizontal position and ,the balll Q3 rolls Jfrom the outer end of the 4cylinvfgl'er v to the inner end thereof. llt will be noticedthat during the closing `movementof the doors A3, .-ld, the arm L moves out ofcontact with the Contact plateN1 about at the time that the cylinder Q1 passe'svthe horizontal plane so that the 'circuit is broken and the solenoid G1 is de'energi'zed. iDuring the further closing movement of the doors A3, A4 by the action of the ball Q3 the arm L travels over the spring tongue N4 and is thus held out of contact with the contact plate lllhen the doors A4 have reached their then the' free end of the arm li passes .the tongue N" and rengages the plate N.-

From the foregoing itwill be seen that by the arrangement described a vuniform temperature is maintained Within the casing A, while the heatingvmeans B supplies a ln case the tempera'- ture of the heating 'nieansl E ydecreases to such an extent that the temperature Within the casing A falls below the normal tempera the thermostat J makes connection l1 and an 4alarm (not supply.

attached end of the' ilo . .the said doors to carry the a connection between t e said switch having .an arm o'n one of `'doors and a segmental contact on the casing the ingress and egress of' atmospheric air, the said doors being 'mounted to swing, means connecting the doors with each other to cause the doors to open or close simultaneously, a heating means within the casingand engaged by the said arm, the segmental contact having a reversing portion, an` iii-V sulated spring tongue on the said segmental contact and over which the said arm travels on its return movement and is thus held out of engagement with the said segmental cony and an overbalancing device on oneof tact,

'said reversing portion of the segmenta contact to switch from one solenoid to another.

7. An incubator, comprising a casing hav-v ingopening and closing `means for the in- 0ress and egress of atmospheric air to and p om they casing, a heating means within the said casing and connected with a source of heat supply, a thermostat contact rods between the adjacent ends oi which extends the said thermostat to connect with either rod, solenoids electrically connected with the said contact rods, a

a `ther;A

ing opening vand closing means solenoids and one" grssandegress of atmospheric' air to andl contact rods between which extends .the said thermostatto con` said'arm onto theVv within the casing, l

nevadas spaced contact plates adapted tote engaged by the said yarm and electrically connected with the said source of electrical energy, and aninsuiated spring member overlying lone of said"4 contact plates and y'Lovera' which said arm passes during its return movement. 8. An incubator. comprising acasi'n havf for t e 1n` from the casing, a heating means within the said casin'and connected lwith. a source of= heat supplay, a thermostat within the casing theadjacent ends ci nect with 'either contact rod, solenoids elec. trically connected with the said contact rods, a source of electrical energy connected with the said solenoids9 actuating means connecting the said solenoids" with the saidl opening and closing means, an-if'nsulated arm mov-` fing with the said 'openingand closing meansk and electrically connected with the said thermostat, spaced segmental contact pla-tes adapted to be engaged by electrically connected with the said source of: electrical lener y, and a spring ltongue secured at one en and overlying oneof the" said contact plates to hold the said contact' plate durin the' return movement of the lsaid arm,;the free end of Isaid insulated arm at theend oijthe return movement loeing adapted to pass beneath the attached end Eet the said arm and to an insulating siipriortl A70. arm out of contact ywith this of the spring tongue and rengagey the-said contact plate. n'

ln testimony source'of electrical energy connected ,with.| name to this specicationin the presence of actuating means connectthe said solenoids,

ing the said solenoids with the said opening and closing means, an arm moving with the said opening nd closing trically connected with the said thermostat,

means ,and elecl two subscribing witnesses.

"whereoi3 i have signed my v 

